asoc: codec: add io header file

Add IO header file to call iowrite32 and ioremap.

Change-Id: I742266b7653c2731fa232fa7d2ebeb916a57a129
Signed-off-by: Meng Wang <[email protected]>

asoc/codecs/audio-ext-clk-up.c

@@ -4,6 +4,7 @@
 
 #include <linux/kernel.h>
 #include <linux/init.h>
+#include <linux/io.h>
 #include <linux/err.h>
 #include <linux/module.h>
 #include <linux/of.h>